Certainly Carvin's R1000 will give you lots of power for a reasonable price. I believe it's 350w @ 4 ohms per side, 500w @ 2 ohms perside, 700w bridged @ 8 ohms, or 1000w bridged @ 4 ohms. I found the R series to be pretty dynamic, and liked it a lot, but in the end I opted for an Ampeg sound.

I like the Ampeg SVT400T, it has two 200w power amps @ 4 ohms or you can bridge it for 400w @ 8 ohms. I got that one for $240 (but it included a B25 cab and a MIM Fender P ).

Do NOT hook both these cabinets up to an amp in the typical way (parallel) until you make ABSOLUTELY SURE the amp is rated for a 2 ohm load; most are not.

Triad cab is 4ohm, the Epiphani 3x10 is 5.53; running these cabs together will create a load (between 2-3 ohms) too low for any head I've ever seen. Many power amps will handle a 2 ohm load in stereo mode, but none that I know of will do so bridged. So, bottom line, if you want to run both these cabs at the same time, you will need a 2 channel power amp, run one cab off of each channel. Probably the best idea anyway, as this will let you control the volume balance of each cab.

You *could* do some creative wiring such that the two cabs are wired together in series, yielding a load of 9-10 ohms. This way you could run both cabs with practically any head, but you wouldn't be getting much wattage out of it, and you would have no control over the volume balance of each cab.